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270 results on '"Guo, Jianpeng"'

1. Coordination Engineering in Zirconium-Nitrogen-Functionalized Materials for N2 Reduction: A First-Principles Simulation

Author

Guo, Jianpeng, Luo, Hao, Zhao, Qinfu, Suo, Bingbing, Zhou, Bo, Zhu, Haiyan, Zhang, Zhiyong, and Song, Qi

Subjects
Condensed Matter - Materials Science
Abstract

Coordination engineering was employed to optimize the coordination environment of the Zr atom anchored on the porphyrins (PP). Five promising ZrPP-A candidates as electrocatalysts for nitrogen reduction reaction (NRR) were identified through a four-step screening strategy. First-principles calculations were utilized to evaluate the performance of the candidate electrocatalysts for NRR. A comprehensive search for reaction pathways revealed that NRR reactions with these selected catalysts tend to follow a hybrid pathway. It is found that orbital hybridization and charge transfer between Zr and its coordination atoms, as well as between ZrPP-A and the adsorbed N2 ensured the stability and high catalytic activity of these selected ZrPP-A. Zr plays a crucial role in coordinating charge transfer during the NRR process. Simultaneously, the coordinating atoms and the PP moiety jointly provide additional charge transfers to or from the adsorbate. An asymmetric coordination environment results in an asymmetric charge distribution of the substrate, causing the adsorbed polarized N2 molecule oriented toward the asymmetric charge aggregation region. Our work underscores the importance of considering not only the single-atom catalyst itself but also its coordination environment for the rational design of efficient catalysts.

Published
2023

21. Sunspots rotation and magnetic transients associated with flares in NOAA AR 11429

Author

Zheng, Jianchuan, Yang, Zhiliang, Guo, Jianpeng, Guo, Kaiming, Huang, Hui, Song, Xuan, and Wan, Weixing

Subjects
Astrophysics - Solar and Stellar Astrophysics
Abstract

We analyze sunspots rotation and magnetic transients in NOAA AR 11429 during two X-class (X5.4 and X1.3) flares using the data from the Helioseismic and Magnetic Imager on board the \emph{Solar Dynamics Observatory}. A large leading sunspot with positive magnetic polarity rotated counterclockwise. As expected, the rotation was significantly affected by the two flares. The magnetic transients induced by the flares were clearly evident in the sunspots with negative polarity. They were moving across the sunspots with speed of order $3-7\ \rm km \ s^{-1}$. Furthermore, the trend of magnetic flux evolution of these sunspots exhibited changes associated with the flares. These results may shed light on the understanding of the evolution of sunspots., Comment: Accepted for publication in RAA, 13 pages, 7 figures

Published
2017
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27. The Use of an Extended Flipped Classroom Model in Improving Students' Learning in an Undergraduate Course

Author

Guo, Jianpeng

Abstract

One of the biggest barriers preventing teachers from utilizing the flipped classroom approach in their teaching practices is the lack of a general and practical framework for guiding the design and implementation of flipped classrooms. This leads to the fact that the effectiveness of the flipped classroom approach is unconfirmed. Building on research findings from the field of learning and instruction, this study proposed a step-by-step general model named the "O-PIRTAS" (Objective, Preparation, Instructional video, Review, Test, Activity, Summary) flipped classroom model and examined its effectiveness in promoting student learning in an undergraduate psychology course. Two classes of 101 first-year undergraduates were taught by the flipped classroom model or the traditional lecture-based approach for 16 weeks. The results supported the effectiveness of the flipped classroom model; the flipped model not only improved the students' perceptions of the teaching quality and peer interaction engagement but also promoted their generic skills development and examination performance. Instructional implications for implementing flipped instruction are provided, and directions for future research are discussed.

Published
2019
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28. Electrostatic waves in pressure waves bounding solar wind stream interaction regions.

Author

Wang Xianghan and Guo Jianpeng

Subjects
ELECTROSTATICS, SOLAR wind, PLASMA Langmuir waves, SOLITONS, ENERGY dissipation
Abstract

Copyright of Reviews of Geophysics & Planetary Physics is the property of Editorial Office of Reviews of Geophysics & Planetary Physics and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Published
2024
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29. Evaluation Method for Node Importance of Communication Network Based on Complex Network Analysis

Author

Zhao, JunYang, Liu, Xiangwei, Guo, Jianpeng, Angrisani, Leopoldo, Series Editor, Arteaga, Marco, Series Editor, Panigrahi, Bijaya Ketan, Series Editor, Chakraborty, Samarjit, Series Editor, Chen, Jiming, Series Editor, Chen, Shanben, Series Editor, Chen, Tan Kay, Series Editor, Dillmann, Rüdiger, Series Editor, Duan, Haibin, Series Editor, Ferrari, Gianluigi, Series Editor, Ferre, Manuel, Series Editor, Hirche, Sandra, Series Editor, Jabbari, Faryar, Series Editor, Jia, Limin, Series Editor, Kacprzyk, Janusz, Series Editor, Khamis, Alaa, Series Editor, Kroeger, Torsten, Series Editor, Liang, Qilian, Series Editor, Martin, Ferran, Series Editor, Ming, Tan Cher, Series Editor, Minker, Wolfgang, Series Editor, Misra, Pradeep, Series Editor, Möller, Sebastian, Series Editor, Mukhopadhyay, Subhas, Series Editor, Ning, Cun-Zheng, Series Editor, Nishida, Toyoaki, Series Editor, Pascucci, Federica, Series Editor, Qin, Yong, Series Editor, Seng, Gan Woon, Series Editor, Speidel, Joachim, Series Editor, Veiga, Germano, Series Editor, Wu, Haitao, Series Editor, Zhang, Junjie James, Series Editor, Liu, Xin, editor, Na, Zhenyu, editor, Wang, Wei, editor, Mu, Jiasong, editor, and Zhang, Baoju, editor

Published
2019
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30. Research on Amount of Information of Multi-satellite Electronic Reconnaissance Based on Joint Probability Data Association

Author

Yang, Gang, Liu, Xiangwei, Guo, Jianpeng, Angrisani, Leopoldo, Series Editor, Arteaga, Marco, Series Editor, Panigrahi, Bijaya Ketan, Series Editor, Chakraborty, Samarjit, Series Editor, Chen, Jiming, Series Editor, Chen, Shanben, Series Editor, Chen, Tan Kay, Series Editor, Dillmann, Ruediger, Series Editor, Duan, Haibin, Series Editor, Ferrari, Gianluigi, Series Editor, Ferre, Manuel, Series Editor, Hirche, Sandra, Series Editor, Jabbari, Faryar, Series Editor, Jia, Limin, Series Editor, Kacprzyk, Janusz, Series Editor, Khamis, Alaa, Series Editor, Kroeger, Torsten, Series Editor, Liang, Qilian, Series Editor, Ming, Tan Cher, Series Editor, Minker, Wolfgang, Series Editor, Misra, Pradeep, Series Editor, Möller, Sebastian, Series Editor, Mukhopadhyay, Subhas, Series Editor, Ning, Cun-Zheng, Series Editor, Nishida, Toyoaki, Series Editor, Pascucci, Federica, Series Editor, Qin, Yong, Series Editor, Seng, Gan Woon, Series Editor, Veiga, Germano, Series Editor, Wu, Haitao, Series Editor, Zhang, Junjie James, Series Editor, Mu, Jiasong, editor, Jia, Min, editor, Wang, Wei, editor, Feng, Xuhong, editor, and Zhang, Baoju, editor

Published
2019
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47. Triple Cross‐linked Dynamic Responsive Hydrogel Loaded with Selenium Nanoparticles for Modulating the Inflammatory Microenvironment via PI3K/Akt/NF‐κB and MAPK Signaling Pathways

Author

Wang, Shuangqing, primary, Liu, Yanhong, additional, Sun, Qianwen, additional, Zeng, Bowen, additional, Liu, Chao, additional, Gong, Liming, additional, Wu, Hao, additional, Chen, Liqing, additional, Jin, Mingji, additional, Guo, Jianpeng, additional, Gao, Zhonggao, additional, and Huang, Wei, additional

Published
2023
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48. Coordination Engineering in Zirconium–Nitrogen-Functionalized Materials for N2Reduction: A First-Principles Simulation

Author

Guo, Jianpeng, Luo, Hao, Zhao, Qinfu, Suo, Bingbing, Zhou, Bo, Zhu, Haiyan, Zhang, Zhiyong, and Song, Qi

Abstract

Coordination engineering was employed to optimize the coordination environment of the zirconium (Zr) atom anchored on the porphyrins (PP), serving as single-atom catalysts (SACs). Five promising ZrPP-A (A = C3O, N4, N2C2-o, C2O2-o, and C2O2-n) candidates as electrocatalysts for nitrogen reduction reaction (NRR) were identified through a “four-step” screening strategy, from a pool of 15 designed models. Performance evaluation of these candidates for NRR was conducted using first-principles calculations. A comprehensive examination of reaction pathways unveiled a predilection for a hybrid pathway when employing the selected catalysts for the NRR. The stability and notable catalytic activity of ZrPP-A stemmed from orbital hybridization and charge transfer mechanisms, occurring both between Zr and its coordinated atoms, as well as between ZrPP-A and the adsorbed N2molecule. Zr played a pivotal role in orchestrating charge transfer during the NRR process. Simultaneously, coordinating atoms and the PP moiety collectively facilitated supplementary charge transfers to or from the adsorbate. Because of the robust coupling between O and its neighboring carbon atoms, no significant bonds were detected between the central Zr and the coordinating O atoms. An asymmetric coordination environment results in an uneven charge distribution within the substrate, inducing polarization of N2molecules and their migration toward regions of asymmetric charge aggregation. This study underscores the significance of not only focusing on the single-atom catalyst itself but also its coordination environment when designing catalysts for enhanced efficiency.

Published
2024
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